# Total R-values

### Total R-value calculations Speckel

A thermal simulation enables the Total R-value of a wall, roof, or floor to be determined, including the effects of thermal bridging. A target value is typically set based on the Project and calculated based on building code requirements. Update your wall, floor or roof settings here.

<img src="https://content.gitbook.com/content/fKJnzF2TwHA3APPbiCpF/blobs/dZPfTzVHmSac6mtLFBVx/file.excalidraw.svg" alt="" class="gitbook-drawing">

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A Total R-value for a wall, floor or roof is calculated as per [AS/NZS 4859.2/ NZ 4214](https://docs.betterbuilding.io/support-and-training/other-support/testing-and-verification/total-r-value-calculations-as-nz-4859.2-+-nzs-4214), NZ 4214, or ISO 6946, subject to the region the Project is located in.
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